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power line insulators






I've looked at many sources but can't seem to find an answer to
this: Why are the ceramic standoff insulators on the high voltage power
lines shaped the way they are? I looked up the resistivities which are on
the order of 10^10 ohms, so I don't think the leakage currents are that
high that the "fins" on these things are needed for cooling. Any clues?


Mike Monce
Connecticut College